W. Dovern, Familienbuch der Reformierten Gemeinde in Eschweiler, Jülich 1980, S. 29
___________________ | ___________________|___________________ | ___________________| ___________________ | | | | |___________________|___________________ | Heinrich HARTWECK | ___________________ | x1727 | | | | ___________________|___________________ | | | | |___________________| ___________________ | | | | |___________________|___________________ |--Heinrich Arnold HARTWECK | (1730-1791) ___________________ | | | Hubert HERSTATT |___________________ | | (1600-1678)x1648 | Isaak HERSTATT | ___________________ | | (1657-1737)x1685 | | | | | Maria REMEIS |___________________ | | (1620-1663)x1648 | Elisabeth HERSTATT | (1692-1732)x1727 | Welter JOHAE | | x1615 | Welter JOHAE | N. | | (1615-1678)x1643 | Mintha JOHAE | (1656-1729)x1685 | Nikolaus ENGELS | | x1620 | Mintha ENGELS | N. (1620-1683)x1643